September weather forecast
Cañas, Costa Rica

The first month of the autumn, September, is still a warm month in Cañas, Costa Rica, with an average temperature ranging between min 22.8°C (73°F) and max 29.7°C (85.5°F).

Temperature

Cañas experiences a minor change to a warm 29.7°C (85.5°F) in average high-temperature during September, closely reflecting August. Cañas, during the month of September, experiences an average low-temperature of 22.8°C (73°F).

Heat index

The average heat index in September is calculated to be a torrid 38°C (100.4°F). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.
Be informed that the heat index values are oriented around shady conditions and gentle breezes. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is an estimation of the warmth sensation when considering humidity levels. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
The physiological way the human body responds to excessive heat is by inducing perspiration, using sweat evaporation as a cooling mechanism. Increased relative humidity interferes with body cooling by slowing the rate of evaporation, resulting in a slower body cooling rate and a heightened feeling of heat. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.

Humidity

In September, the average relative humidity is 86%.

Rainfall

In Cañas, in September, it is raining for 29 days, with typically 261mm (10.28") of accumulated precipitation. Throughout the year, there are 236.6 rainfall days, and 1996mm (78.58") of precipitation is accumulated.

Daylight

In Cañas, the average length of the day in September is 12h and 11min.
On the first day of the month, sunrise is at 05:30 and sunset at 17:49. On the last day of September, in Cañas, Costa Rica, sunrise is at 05:29 and sunset at 17:31 CST.

Sunshine

In Cañas, the average sunshine in September is 7.8h.

UV index

The months with the highest UV index in Cañas are January through September and December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for average individuals.
Note: In September, the maximum UV index of 7 suggests these recommendations:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Enhance your sun protection with tightly woven, yet airy clothing.